Yes / In this study, bond properties of glass fibre reinforced polymer (GFRP) bars embedded in high-strength concrete
(HSC) were experimentally investigated using a pull-out test. The experimental program consisted of testing 84
pull-out specimens prepared according to ACI 440.3R-12 standard. The testing of the specimens was carried out
considering bar diameter (9.5, 12.7 and 15.9 mm), embedment length (2.5, 5, 7.5 and 10 times bar diameter)
and surface configuration (helical wrapping with slight sand coating (HW-SC) and sand coating (SC)) as the main
parameters. Twelve pull-out specimens reinforced with 16 mm steel bar were also tested for comparison purposes.
Most of the specimens failed by a pull-out mode. Visual inspection of the tested specimens reinforced with
GFRP (HW-SC) bars showed that the pull-out failure was due to the damage of outer bar surface, whilst the
detachment of the sand coating was responsible for the bond failure of GFRP (SC) reinforced specimens. The
bond stress – slip behaviour of GFRP (HW-SC) bars is different from that of GFRP (SC) bars and it was also found
that GFRP (SC) bars gave a better bond performance than GFRP (HW-SC) bars. It was observed that the reduction
rate of bond strength of both GFRP types with increasing the bar diameter and the embedment length was
reduced in the case of high-strength concrete. Bond strength predictions obtained from ACI-440.1R, CSAeS806,
CSA-S6 and JSCE design codes were compared with the experimental results. Overall, all design guidelines were
conservative in predicting bond strength of both GFRP bars in HSC and ACI predictions were closer to the tested
results than other codes.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/17246 |
| Date | 02 September 2019 |
| Creators | Saleh, N., Ashour, Ashraf, Sheehan, Therese |
| Publisher | ElSevier |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Article, Accepted manuscript |
| Rights | © 2019 Institution of Structural Engineers. Published by Elsevier Ltd. All rights reserved. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license. |
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